An analysis of the hormone thyroxine produces the following results. When $0.500\,\text{g}$ of thyroxine is heated with aqueous silver nitrate, $0.604\,\text{g}$ of silver iodide is formed. Every atom of iodine in the thyroxine sample is converted into silver iodide. On complete combustion of $0.500\,\text{g}$ of thyroxine, $232\,\text{cm}^3$ of carbon dioxide and $7.72\,\text{cm}^3$ of nitrogen are produced, measured under room conditions. Which molecular formula of thyroxine is consistent with these values?
- A$\text{C}_{15}\text{H}_{11}\text{N}\text{O}_4\text{I}_4\quad M_r = 776.6$
- B$\text{C}_{15}\text{H}_7\text{N}\text{O}_4\text{I}_8\quad M_r = 1280.2$
- C$\text{C}_{30}\text{H}_{25}\text{N}\text{O}_6\text{I}_4\quad M_r = 1002.6$
- D$\text{C}_{30}\text{H}_{21}\text{N}\text{O}_6\text{I}_8\quad M_r = 1506.2$